1399857616 has 40 divisors (see below), whose sum is σ = 2740297824. Its totient is φ = 692714880.

The previous prime is 1399857581. The next prime is 1399857617. The reversal of 1399857616 is 6167589931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399857617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095570 + ... + 1096846.

Almost surely, 2^1399857616 is an apocalyptic number.

1399857616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1399857616 is a deficient number, since it is larger than the sum of its proper divisors (1340440208).

1399857616 is a wasteful number, since it uses less digits than its factorization.

1399857616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939 (or 1933 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The square root of 1399857616 is about 37414.6711331264. The cubic root of 1399857616 is about 1118.6510161751.

The spelling of 1399857616 in words is "one billion, three hundred ninety-nine million, eight hundred fifty-seven thousand, six hundred sixteen".